<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        * {
            margin: 0;
            padding: 0;
        }
        .container{
            margin: 10px;
            display: flex;
            width: 500px;
            height: 200px;
            background-color: #eee;
            color: #666;
            text-align: center;
        }
        .a {
            background-color: #f46;
            width: 300px;
            flex-shrink: 1;
        }
        .b{
            width: 150px;
            flex-shrink: 2;
            background-color: #426983;
        }
        .c {
            width: 200px;
            flex-shrink: 3;
            background-color: #61dafb;
        }
    </style>
</head>
<body>
    <div class="container">
        <div class="item a"></div>
        <div class="item b"></div>
        <div class="item c"></div>
    </div>
</body>
</html>